I think the author is making a mistake assigning the seemingly new competence of the US military to AI, rather than noticing that the US has spent the last half-century or so picking the kinds of fights we absolutely suck at. Force projection, targeted aerial strikes, intelligence gathering, and a nuclear deterrent play to the US miltary's strengths. Convincing the people who we just whacked the leaders of to like us…
until recently, the US generally tried to at least pay lip service to human rights. plus occupations are a great way to funnel money.
can't pretend to be pro-democracy at home when you're exterminating Afghan villiages, and wastelands don't need contractor money to build new schools.